Assume it was 1-click and 100% automated to deploy, run and update a Hub.

How much per month would you be willing to pay to run one? 

No direct economic incentive other than you know you're supporting Farcaster decentralization and you have your own copy of the network.

OK, if you're answer is you wouldn't run one.

Working on Farcaster and Warpcast. Longer thoughts at https://dwr.email

Must each Hub have a copy of the whole network (don't know in detail how it works)? Then it would make sense to have different tiers based on the percentage of the network you're storing. 10$ is nothing in some parts of the world, but a lot someplace else